Which of the following statements about enzymes is NOT true? a. enzymes work best at a specified pH
b. enzymes raise the activation energy to star a reaction
c. enzymes are proteins
d. enzymes are biological catalysts

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?